INTERREG III: STARDUST January 2003- September 2003 VLIZ Lille, 18/09/03

First joint sampling expedition Rupel River Sampling site Intertidal flat: easily sampled at low tide expect relatively contaminated sediments organic rich sediments Lille, 18/09/03

Porewater analysis by DGT/DET/coring Aim Interlaboratory intercomparison identify problems establish protocol for further work Methods used Coring by hand porewater separation: on field USTL, in lab VUB cores for DGT and DET transported to the lab DGT and DET probes deployed at room temperature for 24h (2 cores) USTL: DGT diffusive gels 0.8 and 1.2mm in same core VUB: DGT diffusive gels 0.8 and 0.8mm in different cores Lille, 18/09/03

Lille, 18/09/03

DET DGT Fe As Lille, 18/09/03

DGT VUB DGT USTL DET USTL centrifugation Lille, 18/09/03

DGT VUB DGT USTL centrifugation Lille, 18/09/03

DGT USTL DGT VUB Ni Cu Lille, 18/09/03

DGT VUB DGT USTL centrifugation DET USTL Lille, 18/09/03